. The Bell System technical journal . CS 0 9 Fig. —Family of load displacement curves for cushioning with tangent elasticity. a. Select the point on the load-displacement curve for which the loadis equal to the weight of the packaged item multiplied by the allowableGm. Call this load P9. and the corresponding displacement d^. DYNAMICS OF PACKAGE CUSHIONING 367 ipipi|S|f!!!!|!!i|!!i|!iifii wpiiliit|!iii|t t^-t----i-- :n;::q;^M.::4;::;l»;:l:.M.::.l:.::t- 0 12 3 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 „ 4W;hr Fig. —Maximum displacement for cushioning with cubic elasticity. Seeequati
. The Bell System technical journal . CS 0 9 Fig. —Family of load displacement curves for cushioning with tangent elasticity. a. Select the point on the load-displacement curve for which the loadis equal to the weight of the packaged item multiplied by the allowableGm. Call this load P9. and the corresponding displacement d^. DYNAMICS OF PACKAGE CUSHIONING 367 ipipi|S|f!!!!|!!i|!!i|!iifii wpiiliit|!iii|t t^-t----i-- :n;::q;^M.::4;::;l»;:l:.M.::.l:.::t- 0 12 3 4 5 7 8 9 10 11 12 13 14 15 16 17 18 19 20 „ 4W;hr Fig. —Maximum displacement for cushioning with cubic elasticity. Seeequation ().. nWghr Fig. —Maximum acceleration for cushioning with cubic elasticity. Seeequation (). 368 BELL SYSTEM TECHNICAL JOURNAL b. Select another point {di, Pj) about half way toward the origin from(</2,P2). See Fig. c. Calculate Pi ,2 P. 2 -f 2 1 2«! 2 -¥^1 ^O = ^2 ^2 () -^1 and di didi — di () d. Using the known weight, W2, of the packaged item, the specified heightof drop h, and ko and r from () and (), calculate B, do and Go from(), () and (). Then calculate the maximum acceleration Gmand maximum displacement dm from () and () or find their valuesfrom Figs. and Example: A large vacuum tube, weighing lbs, was packed in a 7 xIz X 15 carton which was supported on corrugated cardboard spring padsin a 10^ X 11| x 18| carton. The latter was, in turn, packed in 28 poundsof excelsior in a 25 x 25 x 30 carton. The tube is rated at 50g and thepackage is intended for a drop of three feet. A rod was inserted thr
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
